package io;

import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.charset.StandardCharsets;

/**
 * 缓冲流写出时的缓冲区的问题
 * */
public class FlushDemo {
    public static void main(String[] args) throws IOException {
        FileOutputStream fos = new FileOutputStream("flush.txt");
        BufferedOutputStream bos = new BufferedOutputStream(fos);
        String line = "和我在成都的街头走一走...";
        bos.write(line.getBytes(StandardCharsets.UTF_8));
        System.out.println("写出完毕");
        bos.flush(); // flush:冲水
        bos.close();//缓冲流close（）时会自动调用一次flush()确保所有数据关闭前写出
    }
}
